Automatically-threading shuttle



. E. S. STIMPSON AUI' OMAT I CALLY THREADI KG 8 HUTTLE Filed Dec. 5. 1923 11 1 a llwqh W "I 1111111111111.1111.111 l 16 lfigS m m-mi I Invenfrar MZ Patented Oct. 7, 1924. l I

UNITED STATES siiata PATENT OFFICE.

EDWARD s. sTIiviPsoN, or HOPEDALE, ivinssaoriusn r rs, AssIGNoR r mmrnn 00 PORATION, on HOPEDALE, MASSACHUSETTS, ACQRPO'RATIQN on MAINE.

AUTOMATICALLY-THREADING SHUTTLE.

Application filed December 3, 1923. Serial No. 678,138.

To all whom it may concern:

Be it known that I, EDWARD S. S'riMPsoN, a citizen of the United States, residing at Hopedale, in the county of Worcester and State of h lassachusetts, have invented an Improvement in Automatically Threading Shuttles, of which the following description, in connection with the accompanying drawings, is a specification, like characters m On the drawings representing like parts. This invention relates to loom shuttles and more particularly to shuttles the automatically threading type.

Shuttles of the automatically threading is type have heretofore been provided with a threading block, which on the first pick of the shuttle following replenishment effects a preliminary or partial threading of the shuttle, and on the return of the shuttle to the replenishing side of the loom effects complete threading of the shuttle. 'During the subsequent weaving "operation, the thread carried inlthe shuttle is liable to loop or overthrow when the shuttle is arrested at the end of its flight and be cut or broken when the shuttle is again picked. The threading blocks as heretofore constructed have sought to retain the thread in the thread passage, and .to this end various forms of overhangs, horns or overlapping parts have been provided. The shuttle of the present invention, however, differs from all of these and is based on the discovery that if the threading block be constructed to permit ready unthreading on the occurrence of an overthrow or loop or balloon of the thread as well as to. cause the shuttle to be readily rethi'eaded as it is subsequently picked, many of the evils and obtype of loom shuttles will be avoided.

vThe shuttle of the present invention, therefore, is so constructed and arranged that should'an overthrow or loop occur in the thread at the end of its flight, suchloop or overthrow will cause the shuttle to become partially or wholly unthreaded and be subsequently threaded on the following picks.

. The overthrow or looping or ballooning of the thread is caused by the sudden arrest ofthe shutt1e,.while the thread itself as it is drawn from the filling carrier or bobbin in the shuttle continues to unwind and swirl or rotate from the end of'the filling carrier jectionable troubles encountered in this end of the shuttle with the threading block or bobbin. Since the shuttle of the present invention utilizes the swirling or rotativcand longitudinal movement of the thread from the bobbin or filling carrier to unthread or partially unthread the shuttle, it is an object of the present invention to so construct. the threading end portion of the shuttle that little or no interference will be presented to the looping or overthrow or swirling action of the thread as the shuttle comes to rest.

In accordance with the present invention, the threading block and threading block receiving'chamber which communicates with the bobbin chamber of the'shuttle are so formed and constructed that no obstruction to the free swirling and ballooning action of the thread will be presented.

An important feature of the present in 'vention, therefore, consists in forming a threading block receiving chamber in the wood of the shuttle with side walls that diverge in non-parallel planes towards the bobbin'chainber and also diverge upwardly,

whereby the communicating opening between the threading block receiving chamber and the bobbin chamber is enlarged transversely and upwardly from the bottom of the threading-block receiving chamber to permit the free swirl of the thread and the formation of a loop or overthrow as the shuttle comes to rest.

In the drawings:

Fig. 1 is a plan view of the threading end of a shuttle embodying the present invention;

Fig. 2 is a sectionon line 2-2 of Fig. 1;

Fig. 3 is a cross-section on line 3 3 of Fig. 1; a

Fig. l is a top plan view of the threading removed, showing more particularly the threading block receiving chamber and side delivery eye communicating therewith at the-narrow part of the chamber; and Fig. 5 is'an underside view of the threading block discharged.

The shuttle l is usually formed of wood and has a'bobbin chamber 2 in which is supported a bobbin or filling carrier 3, and as usual in this class of shuttles the bobbin chamber is open at its bottom for the paswood of the shuttle is cut away to form a threading block receiving chamber 4 of novel construction. The side walls 5 and 6 of the threading block receiving chamber are cut in non-parallel plane s extending longitudinally of the shuttle and the distance between the walls 5 and 6 of the threading block receiving chamber at a point adjacent the bobbin chamber is greater than the distance between the side walls 5 and 6 at points nearer the end of the shuttle, the elfect being that the communicating opening between the threading block receiving chamber and the bobbin chamber of the shuttle as at a is greater than the distance between the side walls of the threading block receiving chamber at any point forward ofthe shuttle, as at b. This flaring relation of the side walls 5 and 6 towards the bobbin cham ber gives increased space for the swirling action of the thread as it is delivered from .the bobbin, so that on the formation of a loop or overthrowv there is no interference with the loop formation or overthrow of the thread, as indicated by dotted lines, Figs. 1 and 2. Thus when the shuttle comes to rest and the overthrow or ballooning action of the thread is to be utilized tounthread or partially unthread the shuttle, there is: no obstruction presented'to the freeformation of the'overthrow or loop.

In accordance with the present invention, the looping or ballooning of the thread as the shuttle comes to rest is utilized in throwing the thread upwardly out of the thread passage, and in order that such throwing of the thread may readily occur without obstruction, the side walls 5and 6 of the shut-' tle diverge upwardly from thebottom 7 of the thread passage, as indicated in Fig. 3, and present a wide open unobstructed top in the threading block receiving chamberfor the free exit of the looping or ballooning thread.

The threading block receiving chamber is provided with a thread casting device, as shown in the present illustration of the in vention, and such device consists of "a part connected to the threading block, which on the occurrence of an overthrow of the thread, casts the thread out from the thread passage and partially or wholly unthreads the shuttle. Where a threading block is employed in connection with a shuttle as-in the present instance, such block has its side walls 8 and 9 diverging towards the bobbin chamber in substantial accordance with the divergence ofthe side walls of the threading block receiving chamber, and similarly the side walls 8 and 9 of the threading block diverge upwardly from the bottom 10 of the block, in accordance with the flare or inclination of'the walls of the threading block stance, has a thread passage 12 extending longitudinally of the shuttle, and may be preferably provided with a bridge 13 at the front end portion of the thread passagaover which the thread passes to the side delivery eye 14.

Within the thread passage of the threading block, as shown, is the thread casting and guiding device 15, the wall or edge 16 of which adjacent to the bobbin chamber extends upwardly, forwardly, andlaterally of the thread passage. ,The construction is such that should the threadas it swirls about the end of the bobbin overthrow or loop as the shuttlev comes to rest, the part leading through thethread casting and guiding device 15 will ride upwardly,.,laterally, and forwardly ofthe thread casting edge'l6 and cast the loop .to be thrown upwardly out of the thread passage. V I

The threading block as shown has a thread director 17 which extends forwardly orjtowards the end of the shuttle abovethe side delivery eye 14, and the. end portion 18.,of the thread director extends laterally to engage the thread on the first pick aftizrreplenishment and direct it throughtheopening 19 on a subsequent pick intothe side delivery eye 14. i Y 1 ,l L

The side" delivery eye 14 is cut throughthe wood of the shuttle and communicates'with the narrow portion of. the. threadingblock receiving chamber, as indicated in Fig. 4.

The frontwardly and downwardly. .con-

verging sidewalls 5 and 6 of the threading importance in an. automaticallythreading shuttle which casts the thread or unthreads the shuttle, because the=life of the wooden shuttle itself is usuallynot as longas the life of the metal threading block. andwhen the wooden portion of the shuttle becomes worn or'broken, the metal threading block from the old and discarded ,ashuttle ,may. be removed and placed in another woodenshuttle provided with the novel formation of the threading .block' receiving chamber wherein the side wallsare formedninnon-parallel I planes which diverge longitudinally towards the bobbin chamber and diverge'upwardly from the bottom ofthe chamber. What is claimed is: l 1.. A loom shuttle having the wood of the shuttle out way at one end to form a threading block receiving chamber, the two side walls of which are cut in non-parallel longitudinally extending planes diverging upwardly from the bottom portion of the chamber and diverging longitudinally of the shuttle towards the bobbin chamber to provide a. wide communicating opening in the bobbin chamber and permit swirling action of the thread as it leaves the filling carrier in the bobbin chamber, and a side delivery eye extending transversely of the shuttle. and communicating with the threading block receiving chamber at the narrow portion thereof.

2. A loom shuttle of the class described provided with a bobbin chamber open at top and bottom and having the wood of the shuttle cut away in front of the bobbin chamber to form a threading block receiving chamber, each of the side walls of which is cut in a plane inclined from the bottom of the chamber upwardly and outwardl from a vertical plane passed through the longitudinal aXis of the shuttle to provide a chamber having a top opening wider than the bottom of the chamber, and inclined outwardly in a direction longitudinally of the shuttle towards the bobbin chamber to provide a wide communication with the bobbin chamber permitting the swirl of the thread as it unwinds from the carrier in the bobbin chamber.

3. A loom shuttle provided with a bobbin chamber open at top and bottom and having a threading block receiving chamber, the side walls of which are cut in planes diverging upwardly from the bottom of the threading block receiving chamber and converging from the bobbin chamber towards the end of the shuttle to receive and accurately position a threading block having similarly inclined walls, and a side delivery eye extending transversely of the shuttle through the adjacent inclined wall of the threading block receiving chamber.

4. An automatically threading loom shuttle having a bobbin chamber and a threading block receiving chamber the longitudinally extending walls of which diverge towards the bobbin chamber to receive between them a threading block having similarly diverging walls for positioning the block in said chamber and bringing the bolt holes of the block and chamber into register as the parts are assembled.

5. A loom shuttle having the wood of the shuttle cutaway at one end to form a threading block receiving chamber, the two side walls of which are cut in non-parallel longitudinally extending planes diverging upwardly from the bottom portion of the chamber and diverging longitudinally of the shuttle towards the bobbin chamber, and a side delivery eye extending transversely of the shuttle and communicating with the threading block receiving chamber at the narrow portion thereof, and a thread, casting device in the widened portion of the block chamber for casting the thread and partially unthreading the shuttle on the occurrence of a loop or overthrow.

6. An automatically threading loom shuttle having a bobbin chamber, a threading block receiving chamber having upwardly diverging side walls, a threading block hav ing a thread passage flaring upwardly, and a thread casting device located in the upwardly flaring thread passage constructed and arranged to cast the thread upwardly from the flaring thread passage to partially or wholly unthread the shuttle on the occurrence of a loop or overthrow as the shuttle is arrested at the end of its flight.

In testimony whereof, I have signed my name to this specification.

EDWARD S. STIMPSON. 

